LDPE Coil

LDPE Coil is a roll-formed plastic film made from low-density polyethylene, a thermoplastic with 99–100% purity and high flexibility, clarity, and chemical inertness. Produced via high-pressure free-radical polymerization, its long-chain branching imparts exceptional elongation, low crystallinity, and smooth extrusion performance. This coil is widely utilized in packaging films, cable insulation, medical container liners, and moisture barriers. Specific uses include sterilizable IV bag liners, high-speed wire sheathing, and dielectric layers in power cable insulation. Additive-free and FDA-compliant variants support cleanroom and food-grade applications. Research has demonstrated improved DC dielectric performance under electric field processing and optimized spherulite structure for enhanced charge dispersion. LDPE coils remain a foundational material in flexible electronics, polymer dielectric engineering, and medical-grade barrier systems.

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Tolerance

Properties

Reference & Citations

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Tolerances

Coil

Thickness		±20%

Material Properties for Polymers

Chemical Resistance

Element	Value
Acids - concentrated	Good-Fair
Acids - dilute	Good
Alcohols	Good
Alkalis	Good
Aromatic hydrocarbons	Fair-Poor
Greases and Oils	Good-Fair
Halogenated Hydrocarbons	Fair-Poor
Halogens	Fair-Poor
Ketones	Good-Fair

Electrical Properties

Element	Value
Dielectric constant @1MHz	2.2-2.35
Dissipation factor @ 1MHz	1-10x 10⁻⁴
Dielectric strength( kV mm⁻¹ )	27
Surface resistivity( Ohm/sq )	10¹³
Volume resistivity( Ohmcm )	10¹⁵-10¹⁸

Physical Properties

Element	Value
Flammability	HB
Radiation resistance	Fair
Refractive index	1.51
Resistance to Ultra-violet	Poor
Limiting oxygen index( % )	17
Water absorption - over 24 hours( % )	0.015
Density( gcm⁻³ )	0.92

Mechanical Properties

Element	Value
Hardness - Rockwell	D41-46 - Shore
Elongation at break( % )	400
Tensile modulus( GPa )	0.1-0.3
Izod impact strength( J m⁻¹ )	1000
Tensile strength( MPa )	May-25

Thermal Properties

Element	Value
Heat-deflection temperature - 0.45MPa( C )	50
Heat-deflection temperature - 1.8MPa( C )	35
Lower working temperature( C )	-60
Upper working temperature( C )	50-90
Specific heat( J K⁻¹ kg⁻¹ )	1900-2300
Thermal conductivity( W m⁻¹ K⁻¹ )	0.33@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	100-200